Icelandic food in general is based on fish and lamb, as well as owing much to Scandinavian and European influences. The salmon of Iceland is a great delicacy, served in many forms, one of the most popular being gravlax, a form of marination. Fishing is Iceland's most important export, accounting for some 80% of the country's gross national product. There is also a heavy emphasis on vegetables grown in greenhouses heated by the natural steam from geysers. Specialities include hangikjot (smoked la